1. Mudanjiang Natural Resources Comprehensive Survey Center, China Geological Survey, Mudanjiang 157000, Heilongjiang, China;
2. Jilin Institute of Geo-environment Monitoring, Changchun 130021, China

Through investigations and analysis of geological disasters in Taiping Bay district of Liaoning, the authors found that the major disasters in this area are collapse, landslide, debris flow and ground collapse. By stud-ying their scale, detriment, stability and distributive rules, it is concluded that the main disaster affecting the motor traffic capacity is collapse, which often occurs on bumped rock slopes exposed to sunlight with slope over 60 de-grees and the height over 10 m. As most collapses happened at or around the compresso-crushed zone and fault in-tersection of deep faults and active faults, the direct stress of the active fault stretched or distorted the roads. Based on the formation conditions and influence factors, the authors focused on analyzing the susceptible segments and the impact on motor traffic capacity.